Hey man, we fight everything, monsters and PCs on arenas.
We back again to Damage x Chance to hit. The vengeance paladin has only +1 attack roll, you need a natural 20 on d20.
The One Punche Man has +11(Favored by the gods) attack roll on 4d20. 5d20 with lucky feat
So now you have Ritual caster, and you have Lucky?
Schroedingers one punch man rides!
At least its better than the Sorcerer King.